메타데이터
| 항목 |
값 |
| Designation |
C/2019 NJ3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-10-22T02:23:32.611200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-11T21:13:02Z |
| Obs used |
70 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
13.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-03-25.0000000 |
| e |
1.00093598 |
| q (au) |
4.361928 |
| a (au) |
-4660.256154 |
| i (deg) |
99.435702 |
| Ω (om, deg) |
142.451880 |
| ω (w, deg) |
246.812804 |
| M (ma, deg) |
-0.000654 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:48:38.96 |
+15:16:23.1 |
HIP 48151 |
18.03 |
| 2026-09-20 12:00 |
09:48:45.16 |
+15:16:16.0 |
HIP 48151 |
17.87 |
| 2026-09-21 00:00 |
09:48:51.32 |
+15:16:09.1 |
HIP 48151 |
17.84 |
| 2026-09-21 12:00 |
09:48:57.46 |
+15:16:02.3 |
HIP 48151 |
17.93 |
| 2026-09-22 00:00 |
09:49:03.56 |
+15:15:55.8 |
HIP 48151 |
18.14 |
| 2026-09-22 12:00 |
09:49:09.63 |
+15:15:49.4 |
HIP 48177 |
18.39 |
| 2026-09-23 00:00 |
09:49:15.67 |
+15:15:43.3 |
HIP 48177 |
18.28 |
| 2026-09-23 12:00 |
09:49:21.68 |
+15:15:37.3 |
HIP 48177 |
18.30 |
| 2026-09-24 00:00 |
09:49:27.65 |
+15:15:31.6 |
HIP 48177 |
18.43 |
| 2026-09-24 12:00 |
09:49:33.59 |
+15:15:26.0 |
HIP 48177 |
18.67 |
| 2026-09-25 00:00 |
09:49:39.49 |
+15:15:20.6 |
HIP 48177 |
19.02 |
| 2026-09-25 12:00 |
09:49:45.36 |
+15:15:15.5 |
HIP 48177 |
19.47 |
| 2026-09-26 00:00 |
09:49:51.19 |
+15:15:10.5 |
HIP 48177 |
20.01 |
| 2026-09-26 12:00 |
09:49:56.99 |
+15:15:05.8 |
HIP 48177 |
20.63 |
| 2026-09-27 00:00 |
09:50:02.75 |
+15:15:01.3 |
HIP 48177 |
21.32 |
| 2026-09-27 12:00 |
09:50:08.48 |
+15:14:56.9 |
HIP 48177 |
22.07 |
| 2026-09-28 00:00 |
09:50:14.17 |
+15:14:52.8 |
HIP 48177 |
22.89 |
| 2026-09-28 12:00 |
09:50:19.82 |
+15:14:48.9 |
HIP 48177 |
23.74 |
| 2026-09-29 00:00 |
09:50:25.44 |
+15:14:45.3 |
HIP 48177 |
24.65 |
| 2026-09-29 12:00 |
09:50:31.02 |
+15:14:41.8 |
HIP 48177 |
25.58 |
| 2026-09-30 00:00 |
09:50:36.56 |
+15:14:38.6 |
HIP 48177 |
26.55 |
| 2026-09-30 12:00 |
09:50:42.06 |
+15:14:35.6 |
HIP 48177 |
27.55 |
| 2026-10-01 00:00 |
09:50:47.52 |
+15:14:32.8 |
HIP 48177 |
28.56 |
| 2026-10-01 12:00 |
09:50:52.95 |
+15:14:30.3 |
HIP 48177 |
29.60 |
| 2026-10-02 00:00 |
09:50:58.34 |
+15:14:28.0 |
HIP 48177 |
30.65 |
| 2026-10-02 12:00 |
09:51:03.68 |
+15:14:25.9 |
HIP 48177 |
31.71 |
| 2026-10-03 00:00 |
09:51:08.99 |
+15:14:24.0 |
HIP 48467 |
32.32 |
| 2026-10-03 12:00 |
09:51:14.26 |
+15:14:22.4 |
HIP 48467 |
31.32 |
| 2026-10-04 00:00 |
09:51:19.48 |
+15:14:21.1 |
HIP 48467 |
30.35 |
| 2026-10-04 12:00 |
09:51:24.67 |
+15:14:20.0 |
HIP 48467 |
29.41 |
| 2026-10-05 00:00 |
09:51:29.81 |
+15:14:19.1 |
HIP 48467 |
28.49 |
| 2026-10-05 12:00 |
09:51:34.91 |
+15:14:18.5 |
HIP 48467 |
27.61 |
| 2026-10-06 00:00 |
09:51:39.97 |
+15:14:18.1 |
HIP 48467 |
26.75 |
| 2026-10-06 12:00 |
09:51:44.98 |
+15:14:18.0 |
HIP 48467 |
25.93 |
| 2026-10-07 00:00 |
09:51:49.96 |
+15:14:18.1 |
HIP 48467 |
25.14 |
| 2026-10-07 12:00 |
09:51:54.88 |
+15:14:18.5 |
HIP 48467 |
24.39 |
| 2026-10-08 00:00 |
09:51:59.77 |
+15:14:19.1 |
HIP 48467 |
23.68 |
| 2026-10-08 12:00 |
09:52:04.61 |
+15:14:20.1 |
HIP 48467 |
23.00 |
| 2026-10-09 00:00 |
09:52:09.40 |
+15:14:21.2 |
HIP 48467 |
22.37 |
| 2026-10-09 12:00 |
09:52:14.15 |
+15:14:22.7 |
HIP 48467 |
21.79 |
| 2026-10-10 00:00 |
09:52:18.86 |
+15:14:24.4 |
HIP 48467 |
21.25 |
| 2026-10-10 12:00 |
09:52:23.52 |
+15:14:26.4 |
HIP 48467 |
20.76 |
| 2026-10-11 00:00 |
09:52:28.13 |
+15:14:28.6 |
HIP 48467 |
20.32 |